A kind of diethanol monoisopropanolamine continuous production process

A monoisopropanolamine, production process technology, applied in sustainable manufacturing/processing, chemical industry, climate sustainability, etc., can solve the problem of inability to ensure continuous and stable production of products, high labor intensity of operators, and poor product quality. Control and other issues, to achieve the effects of less axial back mixing, reduced labor intensity, and reduced side reactions

Active Publication Date: 2022-05-20
湖北仙粼化工有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The first two reaction routes need multiple series reactions because they need multiple feeding and purification in the middle, the equipment investment is large and the quality of the product obtained is not guaranteed. The present invention adopts the third route, but the existing industrial DEA The production of diethanol monoisopropanolamine with PO reaction route mostly adopts batch production process, which cannot control the quality of the produced products, and the labor intensity of the operators is relatively high, so the continuous and stable production of the products cannot be guaranteed. The purity of the final product is not tall

Method used

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  • A kind of diethanol monoisopropanolamine continuous production process
  • A kind of diethanol monoisopropanolamine continuous production process
  • A kind of diethanol monoisopropanolamine continuous production process

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1-7

[0033] The diethanolamine is preheated to 70-80°C before entering the reactor, and the diethanolamine is continuously metered by the mass flow meter 1, and the propylene oxide is continuously metered by the mass flow meter 2, and then flows into the jacketed loop reactor 3, wherein the diethanolamine and epoxy The molar ratio of propane is 1:1.0-1.2, through the internal parts such as static mixer 4 and axial flow propeller 5 in the jacketed loop reactor 3, the materials can be fully mixed, flowed and reacted, and the reaction temperature is controlled to be 75 ℃, the back section is 95℃, and the pressure is 1.8-2MPa. The reaction materials are circulated by the axial flow propeller 5 in the loop reactor, part of the reaction materials flow into the vacuum flash packing tower 7 after being measured by the mass flow meter 6, and the liquid phase discharge at the bottom of the vacuum flash packing tower 7 is Diethanolamine monoisopropanolamine product, go to product intermediate...

Embodiment 8-14

[0040]The diethanolamine is preheated to 70-80°C before entering the reactor, and the diethanolamine is continuously metered by the mass flow meter 1, and the propylene oxide is continuously metered by the mass flow meter 2, and then flows into the jacketed loop reactor 3, wherein the diethanolamine and epoxy The molar ratio of propane is 1:1.02, through the static mixer 4, axial flow propeller 5 and other internal parts in the jacketed loop reactor 3, the materials can be fully mixed, flowed and reacted, and the reaction temperature is controlled at 60-100°C , where the front section is 70-80°C, and the back section is 90-100°C. Pressure 1.8-2MPa. The reaction materials are circulated by the axial flow propeller 5 in the loop reactor, part of the reaction materials flow into the vacuum flash packing tower 7 after being measured by the mass flow meter 6, and the liquid phase discharge at the bottom of the vacuum flash packing tower 7 is Diethanolamine monoisopropanolamine pro...

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Abstract

The invention discloses a continuous production process of diethanol monoisopropanolamine, which comprises the following four steps: precise metering, mixed reaction, flash separation, residue removal and recovery. In the precise metering stage, the process monitors the feeding of raw materials in real time through the control of mass flowmeters to ensure its accuracy. During the mixing reaction, the jacketed loop reactor controls the temperature, and the static mixer and axial flow propeller ensure that the raw materials are fully mixed. , flow, and reaction ensure the high yield, high purity and continuity of the obtained product, and perform environmental protection treatment and recovery of redundant raw materials and intermediates in the stages of flash separation and residue removal and recovery. The invention ensures the continuous production of diethanol monoisopropanolamine and can meet higher requirements for the yield and purity of diethanol monoisopropanolamine, the production operation is flexible, and the labor intensity of workers is greatly reduced, which is beneficial to large Large-scale industrial production.

Description

technical field [0001] The invention relates to the technical field of diethanol monoisopropanolamine chemical industry, in particular to an industrial continuous production process of diethanol monoisopropanolamine. [0002] technical background [0003] Diethanol monoisopropanolamine, also known as 1-[N,N-bis(2-hydroxyethyl)amino]propan-2-ol, referred to as DEIPA, is a colorless or light yellow transparent irritating ammonia odor Viscous liquid, stable at normal temperature and pressure. [0004] In 2011, my country began large-scale industrial production of diethanol monoisopropanolamine. Most of the consumption field is concentrated in cement grinding aids. Diethyl monoisopropanolamine is known for its better adaptability and early and later cement strength enhancement. Obvious advantages, favored by grinding aid and concrete admixture enterprises in my country. The existing production process of diethanol monoisopropanolamine mainly has three routes: (1) reaction route ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C07C213/04C07C213/10C07C215/12B01J19/24
CPCY02P20/10
Inventor 曾曼华尹述柏
Owner 湖北仙粼化工有限公司
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